1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaee0929ab959f5a5d1fd4a476c15be15ecbdaa6620fdac2f90469242db7908d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e979eec-fd6c-40ee-85c3-02a57baa9de7.json and https://artists.proofprofile.net/proofs/artist/7e979eec-fd6c-40ee-85c3-02a57baa9de7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee350a86a72db09b907aa203dc373e9a293b195432f82e6d1ce95a89e9dc28f. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2144091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4fe22cb01eab8087672b3cf9c27469f3705a503d36285a5825e0730ab77ca8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2144094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8b8a1fa0de3df449e862b469695af183e5fe818418cefa4d478cfa46d9dadc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2144093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c853abc3c8a87b872e2c823bd3486777dd3bf3c0bc8522f202baced13a15bcb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2144095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a83b3931138ea9f4bf993992639196ba8ae40cb049569f53d6eddc4b134477e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2219421.
Bedtime Lullabies: Bicycle Built for Two
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737d012f0babb7d8ccd2447c34cde6b811473e9f7b6203e717d464e81d143fc5. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2232274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab8dfdc62d43ad1a26339018b2002549b7b8880f8c9ec001b08023aafc784af. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2232276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc0a4da7c5f9fe5ae85a8ac6f62a173c0208b3a77b1a48804548a0f80babcec. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:16:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2233887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e136bd7a340f20115948b5669f39962a4a17741902c730aba04d0e45d5b6a9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2233888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b84c976bea543944327aaa4c3b915ca0e6a8a8baf25613bf859d055cdbe9255. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2233889.